The plugin has stopped working with latest update. Restoring to previous version it works. I have added this in http://www.incarz.com/
but it stopped working after update. So i have changed it to other plugin.

I have Thesis theme and the plugin doesn't work on my site--it's not inserting the attributes to make fancybox work on clicked images, etc. This is the first time I've installed the plugin on my site, and hitting 'reset defaults' unfortunately didn't work.

Hmm, "Revert to defaults" didn't work, deactivating, uninstalling, going back to 2.7.5 didn't work. Then deactivated, uninstalled, then went to 3.0.1 again, that didn't didn't work, I'm outta luck. Hoping for a fix, perhaps 3.0.2 is coming soon? Any known conflicts with other Plugins? I don't have any other Plugins installed that use jQuery.

Glad that fixed it. Just to clarify though, plugins that use jQuery are not by definition incompatible with Fancybox for WordPress, the problem arises only when a plugin loads jQuery on it's own instead of using WordPress functions to do it, causing jQuery to load twice and break things. :)

Got great clarification that I'd like to share, since my post above implies the very presence of jquery broke things, and that's not the case:

...plugins that use jQuery are not by definition incompatible with Fancybox for WordPress, the problem arises only when a plugin loads jQuery on it's own instead of using WordPress functions to do it, causing jQuery to load twice and break things...

I'm REALLY new at wordpress, CSS, HTML, etc and was hoping Fancybox would be an easy, snazzy solution on my Thesis site. I updated to 3.3.1 today and installed Fancybox but it won't work. Is there something I'm missing?

I'd like it to work on this page but I'm not sure if I need to add anything to my custom file editor to make it happen.